"A commercial ZFS solution is (still) coming to Mac OS X, thanks to former Apple filesystem and OS engineer Don Brady (who previously worked on the abandoned internal Apple project to port ZFS). Brady and his company, Ten's Complement, just launched a limited private beta in hopes to have the software polished and ready for a summer launch this year. Ars spoke with Brady, who has a long history engineering filesystems for Mac OS and Mac OS X, to find out a little about his previous work with ZFS at Apple, and what Mac users can expect to gain from Ten's Complement's port of ZFS."

XFS is interesting, but it has a problem in that it is meant for very high quality workstations and servers connected to battery backups. It really doesn't take flickering power levels well at all, which would be a real problem on notebooks. While this issue has been largely worked out in the Linux implementation, I somewhat doubt that is the implementation Apple would use.

XFS is interesting, but it has a problem in that it is meant for very high quality workstations and servers connected to battery backups. It really doesn't take flickering power levels well at all, which would be a real problem on notebooks.

Another problem XFS has, it that your data is not safe. Your data might get corrupted, without XFS noticing it. Just read the research papers on this, which I linked to.